阅读说明：本技术 导流式旋流雾化喷嘴 (Flow guiding type rotational flow atomizing nozzle ) 是由 朱海天 高闯 郑甜华 汪京 冯志炜 刘玉芳 于 2021-08-30 设计创作，主要内容包括：本发明公开了一种导流式旋流雾化喷嘴,液体经过柱形芯本体、旋流导叶、上部导流柱、下部导流锥同雾化喷嘴外壳之间形成的液体通道,上部导流柱使液体在旋转的过程中不会因为过度扩张而导致流速降低过大,使液体在管状旋流室部内以较高的流速喷出,液体离心力使得液体液膜将贴附在椎管状收缩部内壁上,最终贴附在喷孔的壁面上喷出。该导流式旋流雾化喷嘴,液体速度损失小,且上部导流柱和下部导流锥可进一步增加旋流强度,使液膜更加薄,使小流量工况下的液膜厚度更小、雾化效果更佳,在低流量时能保证雾化燃料的索太尔平均直径较小且周向分布均匀,保证在小流量工况下有好的雾化效果,并且结构简单、加工方便且便于拆卸和安装。(The invention discloses a flow-guiding type rotational flow atomizing nozzle, wherein liquid passes through a liquid channel formed between a cylindrical core body, a rotational flow guide vane, an upper flow-guiding column, a lower flow-guiding cone and an atomizing nozzle shell, the upper flow-guiding column ensures that the flow velocity of the liquid is not reduced too much due to excessive expansion in the rotating process, the liquid is sprayed out at a higher flow velocity in a tubular rotational flow chamber part, and the liquid film is attached to the inner wall of a conical tubular contraction part and finally attached to the wall surface of a spray hole by the centrifugal force of the liquid. This water conservancy diversion formula whirl atomizing nozzle, liquid velocity loss is little, and upper portion water conservancy diversion post and lower part water conservancy diversion awl can further increase the whirl intensity, make the liquid film thinner, make the liquid film thickness under the low discharge operating mode littleer, atomization effect is better, can guarantee when the low discharge that atomized fuel's suo taier mean diameter is less and the circumference distributes evenly, guarantee to have good atomization effect under the low discharge operating mode, and simple structure, processing convenience and convenient to detach and installation.)

1. A diversion type rotational flow atomizing nozzle is characterized by comprising an atomizing nozzle shell (1) and an atomizing nozzle core body (2);

the lower end of a cylindrical core body (20) of the atomizing nozzle core body (2) is provided with a swirl guide vane (21) and a flow guide core (22);

the flow guide core (22) is divided into an upper flow guide column (221) and a lower flow guide cone (222);

the upper end of the upper diversion column (221) is fixedly connected to the center of the lower end of the cylindrical core body (20);

n swirl guide vanes (21) are uniformly formed at the lower end of the cylindrical core body (20) around the upper diversion column (221), and N is an integer greater than 2;

the outer diameter of the lower diversion cone (222) is gradually reduced from top to bottom;

the atomizing nozzle shell (1) is provided with a tubular shell body (10), a tubular cyclone chamber part (12) and a conical contraction part (13) from top to bottom in sequence;

the inner diameter of the tubular cyclone chamber part (12) is smaller than the inner diameter of the tubular shell body (10), and an annular positioning plane (104) is formed between the tubular cyclone chamber part (12) and the tubular shell body (10);

the inner diameter of the vertebral tubular constriction (13) is gradually reduced from top to bottom;

a spray hole (131) is formed at the lower end of the conical contraction part (13);

the atomizing nozzle core body (2) is coaxially arranged in the atomizing nozzle shell (1), the lower end of the swirl guide vane (21) abuts against the annular positioning plane (104), and the lower guide cone (222) is arranged on the conical contraction part (13);

a liquid channel is formed between the atomizing nozzle core body (2) and the atomizing nozzle shell (1).

2. The flow-guided cyclonic atomizing nozzle of claim 1,

the connecting part of the lower end of the tubular shell body (10) and the annular positioning plane (104) forms a fillet (103).

3. The flow-guided cyclonic atomizing nozzle of claim 1,

and N is any integer from 3 to 18.

4. The flow-guided cyclonic atomizing nozzle of claim 1,

a crown part is formed at the upper end of the cylindrical core body (20) of the atomizing nozzle core body (2);

the crown has an outer diameter greater than an outer diameter of the cylindrical core body (20);

the crown part is fixed with the upper part of the atomizing nozzle shell (1) in an interference fit mode.

5. The flow-guided cyclonic atomizing nozzle of claim 1,

a shell bolt positioning hole (101) is formed in a tubular shell body (10) of the atomizing nozzle shell (1);

a cylindrical core body (20) of the atomizing nozzle core body (2) is provided with a core body bolt positioning hole (201);

when atomizing nozzle core (2) is coaxial to be placed in atomizing nozzle shell (1) and makes whirl stator (21) lower extreme supports and leans on when ring form locating plane (104), make casing bolt locating hole (101) aim at core bolt locating hole (201), through casing bolt locating hole (101) and core bolt locating hole (201) with the bolt insertion alignment, make atomizing nozzle core (2) and atomizing nozzle shell (1) axial spacing are together fixed.

6. The flow-guided cyclonic atomizing nozzle of claim 5,

the atomizing nozzle shell (1) is provided with four shell bolt positioning holes (101);

the atomizing nozzle core body (2) is provided with two core body bolt positioning holes (201) which are symmetrically arranged along the axis.

7. The flow-guided cyclonic atomizing nozzle of claim 1,

the clearance between the lower diversion cone (222) and the inner wall of the conical tubular contraction part (13) is smaller than the distance between the upper diversion column (221) and the inner wall of the tubular cyclone chamber part (12);

the lower end of the lower diversion cone (222) is designed to be a blunt body.

8. The flow-guided cyclonic atomizing nozzle of claim 7,

the distance between the upper diversion column (221) and the inner wall of the tubular cyclone chamber part (12) is 0.5 to 5 times of the diameter of the spray hole (131);

the distance between the lower diversion cone (222) and the inner wall of the conical contraction part (13) is 0.1 to 0.5 times of the diameter of the spray hole (131).

9. The flow-guided cyclonic atomizing nozzle of claim 1,

the swirl guide vane (21) is provided with a small flow guide angle side wall surface (205), a small flow guide angle surface (204), an axial inner arc surface (208) and an impact wall surface (203);

the small diversion angle side wall surface (205) is positioned with a vector tangent to the inner wall of the tubular cyclone chamber part (12);

the positioning vector of the small flow guide angle surface (204) is tangent to the cylindrical surface of the upper flow guide column (221), the end far away from the upper flow guide column (221) is connected with the small flow guide angle side wall surface (205), and the end close to the upper flow guide column (221) is connected with one end of the inward cambered surface (208);

the impact wall surface (203) is parallel to the flow guide small-angle side wall surface (205), and the end, close to the upper flow guide column (221), of the impact wall surface is connected with the other end of the axial cambered surface (208);

the axial intrados (208) conform to a radius of an inner wall of the tubular swirl chamber portion (12).

10. The flow-guided swirl atomizing nozzle of claim 9,

the width of the small diversion angle face (204) is 1/10-1/5 of the width of the small diversion angle side wall face (205).

Technical Field

The invention relates to a gas turbine, in particular to a diversion type rotational flow atomizing nozzle.

Background

Fuel nozzles are an important component of gas turbines that burn liquid fuels. A typical gas turbine engine comprises three major components, namely a compressor, a combustor and a turbine. The fuel nozzle is used for injecting liquid fuel into the combustion chamber for combustion, releasing energy and outputting power outwards through the turbine, so that the characteristics of the fuel nozzle have great influence on the performance and the service life of the combustion chamber. The high combustion efficiency, stable operating range, uniform outlet temperature distribution, low fuel consumption, cooling of the liner, and low pollutant emissions of gas turbine combustors place higher demands on the atomizing nozzle. The on-duty atomizing nozzle plays a role in igniting and stabilizing flame in a combustion chamber of a gas turbine, but mainly adopts diffusion combustion in the combustion process, and the generation amount of pollutants generated by the diffusion combustion is large, so the liquid supply flow in the on-duty atomizing nozzle needs to be low to meet a better emission effect, but when the liquid supply flow is low, the atomizing effect of the on-duty atomizing nozzle is generally poor, and even the spraying phenomenon of large liquid drops occurs, and the parameters of specific influence of the on-duty atomizing nozzle have atomizing performance indexes such as Sotella mean diameter, circumferential distribution, atomizing angle and the like.

Disclosure of Invention

The invention aims to solve the technical problem of providing a flow-guiding type swirl atomizing nozzle, which can ensure that the liquid film thickness is smaller and the atomizing effect is better under the working condition of small flow, can ensure that the Solter average diameter of atomized fuel is smaller and the atomized fuel is uniformly distributed in the circumferential direction under the low flow, and has the advantages of simple structure, convenient processing and convenient disassembly and assembly.

In order to solve the technical problem, the invention provides a flow guide type rotational flow atomizing nozzle which comprises an atomizing nozzle shell 1 and an atomizing nozzle core body 2;

the lower end of the cylindrical core body 20 of the atomizing nozzle core body 2 is provided with a swirl guide vane 21 and a flow guide core 22;

the flow guide core 22 is divided into an upper flow guide column 221 and a lower flow guide cone 222;

the upper end of the upper diversion column 221 is fixedly connected to the center of the lower end of the cylindrical core body 20;

the N swirl guide vanes 21 are uniformly formed at the lower end of the cylindrical core body 20 around the upper guide column 221, and N is an integer greater than 2;

the outer diameter of the lower deflector cone 222 is gradually reduced from top to bottom;

the atomizing nozzle shell 1 comprises a tubular shell body 10, a tubular swirl chamber part 12 and a conical contraction part 13 from top to bottom in sequence;

the inner diameter of the tubular swirl chamber 12 is smaller than the inner diameter of the tubular housing body 10, and an annular positioning plane 104 is formed between the tubular swirl chamber 12 and the tubular housing body 10;

the inner diameter of the vertebral tubular constriction 13 decreases gradually from top to bottom;

the lower end of the conical contraction part 13 is provided with a spray hole 131;

the atomizing nozzle core body 2 is coaxially arranged in the atomizing nozzle shell 1, the lower end of the swirl guide vane 21 abuts against the annular positioning plane 104, and the lower guide cone 222 is arranged in the conical contraction part 13;

a liquid channel is formed between the atomizing nozzle core body 2 and the atomizing nozzle shell 1.

Preferably, the junction between the lower end of the tubular housing body 10 and the annular positioning plane 104 forms a rounded corner 103.

Preferably, N is any one integer of 3 to 18.

Preferably, the upper end of the cylindrical core body 20 of the atomizing nozzle core 2 is formed with a crown;

the crown has an outer diameter greater than the outer diameter of the cylindrical core body 20;

the crown part is fixed with the upper part of the atomizing nozzle shell 1 in an interference fit mode.

Preferably, the tubular housing body 10 of the atomizing nozzle housing 1 is formed with a housing latch positioning hole 101;

the cylindrical core body 20 of the atomizing nozzle core body 2 is provided with a core body bolt positioning hole 201;

when the atomizing nozzle core body 2 is coaxially placed in the atomizing nozzle shell 1 to enable the lower end of the swirl guide vane 21 to abut against the annular positioning plane 104, the shell bolt positioning hole 101 is aligned with the core bolt positioning hole 201, and the atomizing nozzle core body 2 and the atomizing nozzle shell 1 are axially limited and fixed together by inserting the bolt into the aligned shell bolt positioning hole 101 and the core bolt positioning hole 201.

Preferably, the atomizing nozzle housing 1 has four housing pin positioning holes 101;

the atomizing nozzle core 2 has two axially symmetrically arranged core pin positioning holes 201.

Preferably, the clearance between the lower deflector cone 222 and the inner wall of the conical narrowing portion 13 is smaller than the distance between the upper deflector column 221 and the inner wall of the tubular swirl chamber portion 12.

Preferably, the distance between the upper deflector column 221 and the inner wall of the tubular cyclone chamber 12 is 0.5 to 5 times the diameter of the nozzle 131;

the distance between the lower diversion cone 222 and the inner wall of the conical contraction part 13 is 0.1 to 0.5 times of the diameter of the spray hole 131.

Preferably, the lower end of the lower deflector cone 222 is designed as a blunt body.

Preferably, the swirl vane 21 has a small flow angle sidewall surface 205, a small flow angle surface 204, an axial intrados surface 208, and an impact wall surface 203;

the small diversion angle side wall surface 205 is positioned with a vector tangent to the inner wall of the tubular swirl chamber part 12;

the positioning vector of the small flow guide angle surface 204 is tangent to the cylindrical surface of the upper flow guide column 221, the end far away from the upper flow guide column 221 is connected with the small flow guide angle side wall surface 205, and the end near the upper flow guide column 221 is connected with one end of the axial inner arc surface 208;

the impact wall surface 203 is parallel to the flow guide small-angle side wall surface 205, and the end of the impact wall surface close to the upper flow guide column 221 is connected with the other end of the axial arc surface 208;

the axially intrados surface 208 conforms to the radius of the inner wall of the tubular swirl chamber portion 12.

Preferably, the width of the small diversion angle surface (204) is 1/10-1/5 of the width of the small diversion angle side wall surface (205).

The liquid passes through a liquid channel formed between the cylindrical core body 20, the swirl guide vane 21, the upper guide column 221, the lower guide cone 222 and the atomizing nozzle shell 1 and is finally sprayed out from the spray hole 131, the liquid forms a liquid film near the spray hole 131, and the Sotel average particle size and the atomizing angle required by combustion are finally formed after a series of atomizing processes of liquid film crumpling, liquid strip breaking, liquid drop crushing and the like. This water conservancy diversion formula whirl atomizing nozzle, atomizing nozzle core 2's whirl stator 21, upper portion water conservancy diversion post 221 and lower part water conservancy diversion awl 222 form the water conservancy diversion effect jointly, upper portion water conservancy diversion post 221 makes liquid can not lead to the velocity of flow to reduce too big because of excessive expansion at rotatory in-process, make liquid spout with higher velocity of flow in tubulose whirl housing portion 12, liquid centrifugal force makes the liquid film will attach on the inner wall of canalis tubulose shrink portion 13, finally attach and spout on the wall of orifice 131, liquid film thickness reaches the minimum this moment, the broken liquid drop that forms of final liquid film. This water conservancy diversion formula whirl atomizing nozzle, liquid velocity loss is little, and upper portion water conservancy diversion post 221 and lower part water conservancy diversion awl 222 can further increase the whirl intensity, can make the liquid film thinner, the particle diameter of once breakage will be littleer, make the secondary crushing particle diameter also littleer, can make the liquid film thickness under the low discharge operating mode littleer, atomization effect is better, evaporation effect in gas turbine is also more obvious, the passageway that a plurality of whirl stator 21 are constituteed compares traditional three tangential hole design and can make liquid circumference distribute more for even, can guarantee when the low discharge that atomized fuel's suoeer mean diameter is less and circumference distributes evenly, can guarantee to have good atomization effect under the low discharge operating mode, and simple structure, convenient processing and convenient to detach and installation.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the present invention are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a cross-sectional view of one embodiment of a flow-directing, swirl atomizing nozzle of the present invention;

FIG. 2 is a schematic three-dimensional cross-sectional view of an atomizing nozzle housing of an embodiment of the flow-directing swirler of the present invention;

FIG. 3 is a schematic three-dimensional cross-sectional view of an atomizing nozzle core of an embodiment of the flow-directing swirler of the present invention;

FIG. 4 is a graphical representation of atomizing nozzle core geometry for one embodiment of the flow directing swirl atomizing nozzle of the present invention.

The reference numbers in the figures illustrate:

1 atomizing nozzle housing; 10 a tubular shell body; 12 a tubular swirl chamber portion; 13 a spinal tubular constriction; 131 spraying holes; 103 rounding off; 104 positioning a plane; 2 atomizing the nozzle core; 20 a cylindrical core body; 21 swirl guide vanes; 22 a flow guide core; 221 an upper diversion column; 222 a lower deflector cone; 101, a shell bolt positioning hole; 201 core body bolt positioning holes; 205 flow guiding small-angle side wall surfaces; 204 small diversion angle surfaces; 208 axial intrados; 203 impact the wall surface.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

As shown in fig. 1, 2 and 3, the diversion type swirl atomizing nozzle comprises an atomizing nozzle shell 1 and an atomizing nozzle core body 2;

the lower end of the cylindrical core body 20 of the atomizing nozzle core body 2 is provided with a swirl guide vane 21 and a flow guide core 22;

the flow guide core 22 is divided into an upper flow guide column 221 and a lower flow guide cone 222;

the upper end of the upper diversion column 221 is fixedly connected to the center of the lower end of the cylindrical core body 20;

the N swirl guide vanes 21 are uniformly formed at the lower end of the cylindrical core body 20 around the upper guide column 221, and N is an integer greater than 2;

the outer diameter of the lower deflector cone 222 is gradually reduced from top to bottom;

the atomizing nozzle shell 1 comprises a tubular shell body 10, a tubular swirl chamber part 12 and a conical contraction part 13 from top to bottom in sequence;

the inner diameter of the tubular swirl chamber 12 is smaller than the inner diameter of the tubular housing body 10, and an annular positioning plane 104 is formed between the tubular swirl chamber 12 and the tubular housing body 10;

the inner diameter of the vertebral tubular constriction 13 decreases gradually from top to bottom;

the lower end of the conical contraction part 13 is provided with a spray hole 131;

the atomizing nozzle core body 2 is coaxially arranged in the atomizing nozzle shell 1, the lower end of the swirl guide vane 21 abuts against the annular positioning plane 104, and the lower guide cone 222 is arranged in the conical contraction part 13;

a liquid channel is formed between the atomizing nozzle core body 2 and the atomizing nozzle shell 1.

In the first embodiment of the flow-guiding type swirl atomizing nozzle, the liquid passes through the liquid passage formed between the cylindrical core body 20, the swirl guide vane 21, the upper flow-guiding column 221, the lower flow-guiding cone 222 and the atomizing nozzle housing 1, and is finally sprayed out from the spray hole 131, the liquid forms a liquid film near the spray hole 131, and after a series of atomization processes such as liquid film wrinkling, liquid strip breaking, liquid drop breaking and the like, the stole average particle size and the atomization angle required by combustion are finally formed. This water conservancy diversion formula whirl atomizing nozzle, atomizing nozzle core 2's whirl stator 21, upper portion water conservancy diversion post 221 and lower part water conservancy diversion awl 222 form the water conservancy diversion effect jointly, upper portion water conservancy diversion post 221 makes liquid can not lead to the velocity of flow to reduce too big because of excessive expansion at rotatory in-process, make liquid spout with higher velocity of flow in tubulose whirl housing portion 12, liquid centrifugal force makes the liquid film will attach on the inner wall of canalis tubulose shrink portion 13, finally attach and spout on the wall of orifice 131, liquid film thickness reaches the minimum this moment, the broken liquid drop that forms of final liquid film. The first flow guiding type rotational flow atomizing nozzle of the embodiment, the liquid velocity loss is small, and the upper flow guiding column 221 and the lower flow guiding cone 222 can further increase the rotational flow strength, can make the liquid film thinner, the particle size of primary crushing will be smaller, make the secondary crushing particle size also smaller, can make the liquid film thickness under the small flow working condition smaller, the atomization effect is better, the evaporation effect in the gas turbine is also more obvious, the passageway that a plurality of rotational flow guide vanes 21 constitute compares traditional three tangential hole design and can make liquid circumferential distribution more even, can guarantee that the small and circumferential distribution of suo taier mean diameter of atomized fuel is even when the low flow, can guarantee to have good atomization effect under the small flow working condition, and the steam generator is simple in structure, convenient processing and convenient detachment and installation.

Example two

Based on the flow guiding type swirl atomizing nozzle of the first embodiment, a fillet 103 is formed at the connection position of the lower end of the tubular shell body 10 and the annular positioning plane 104.

Preferably, N is any one integer of 3 to 18.

In the second embodiment of the flow-guiding type swirl atomizing nozzle, the liquid passes through the cylindrical core body 20, the rounded corners 103, the swirl guide vanes 21, the upper flow-guiding columns 221, the lower flow-guiding cones 222 and the atomizing nozzle shell 1 to form a liquid channel, and is finally sprayed out from the spray holes 131, and the radius of the rounded corners 103 can be increased to reduce the pressure loss of the liquid at the position.

EXAMPLE III

Based on the flow-guiding type swirl atomizing nozzle of the first embodiment, the upper end of the cylindrical core body 20 of the atomizing nozzle core body 2 is formed with a crown;

the crown has an outer diameter greater than the outer diameter of the cylindrical core body 20;

the crown part is fixed with the upper part of the atomizing nozzle shell 1 in an interference fit mode.

When the atomizing nozzle is installed, the crown of the atomizing nozzle core body 2 and the atomizing nozzle shell 1 can form interference fit by using larger pressing force, and liquid leakage is prevented.

Example four

Based on the flow-guiding type swirl atomizing nozzle of the first embodiment, a tubular shell body 10 of the atomizing nozzle shell 1 is provided with a shell bolt positioning hole 101;

the cylindrical core body 20 of the atomizing nozzle core body 2 is provided with a core body bolt positioning hole 201;

when the atomizing nozzle core body 2 is coaxially placed in the atomizing nozzle shell 1 to enable the lower end of the swirl guide vane 21 to abut against the annular positioning plane 104, the shell bolt positioning hole 101 is aligned with the core bolt positioning hole 201, and the atomizing nozzle core body 2 and the atomizing nozzle shell 1 are axially limited and fixed together by inserting the bolt into the aligned shell bolt positioning hole 101 and the core bolt positioning hole 201.

Preferably, the atomizing nozzle housing 1 has four housing pin positioning holes 101;

the atomizing nozzle core 2 has two axially symmetrically arranged core pin positioning holes 201.

The two sets of bolts are positioned to better fix the atomizing nozzle core body 2.

The fourth embodiment's water conservancy diversion formula whirl atomizing nozzle works as atomizing nozzle core 2 is coaxial to be placed in atomizing nozzle shell 1 back, through inserting casing bolt locating hole 101 and corresponding core bolt locating hole 201 with the bolt, will atomizing nozzle core 2 and atomizing nozzle shell 1 axial spacing are fixed together, avoid in the actual motion because the vibration makes atomizing nozzle core 2 take place the skew relatively atomizing nozzle shell 1 and lead to liquid atomization effect not good. After the positioning pin is removed, the atomizing nozzle core 2 can be pulled out upward from the atomizing nozzle housing 1. The flow guide type swirl atomizing nozzle of the fourth embodiment is only required to remove and insert the surrounding plug pins along the plug pin positioning holes when the nozzle needs to be disassembled and assembled.

EXAMPLE five

According to the guiding type swirl atomizing nozzle of the first embodiment, the gap between the lower guiding cone 222 and the inner wall of the conical shrinking portion 13 is smaller than the distance between the upper guiding column 221 and the inner wall of the tubular swirl chamber portion 12, so that the liquid flow rate is further increased.

Preferably, the distance (the width of the flow guide channel) between the upper guide pillar 221 and the inner wall of the tubular cyclone chamber 12 is 0.5 to 5 times the diameter of the nozzle 131; the distance between the lower diversion cone 222 and the inner wall of the conical contraction part 13 is 0.1 to 0.5 times of the diameter of the spray hole 131. When the width of the diversion channel is smaller, the flow velocity is larger, the atomization angle is larger, and the atomization effect is better. And defining the width of the flow guide channel according to the actually required flow quantity, and selecting the width of the small flow guide channel as much as possible. The smaller the distance between the lower deflector cone 222 and the inner wall of the conical constriction 13, the more evident the optimization effect for the small flow nozzle, but considering the factors of machining precision, installation error and deposition of certain components in the liquid, a suitable gap is adopted according to the filtration effect of the actual liquid fuel and the nozzle dimensions (millimeter, centimeter, decimeter, etc.).

Preferably, the lower end of the lower deflector cone 222 is designed as a blunt body to form a stable air column, which also ensures the stability of the liquid film near the nozzle 131.

EXAMPLE six

Based on the flow guiding type swirl atomizing nozzle of the first embodiment, as shown in fig. 3 and 4, the swirl vane 21 has a flow guiding small-angle side wall surface 205, a flow guiding small-angle surface 204, an axial inner arc surface 208, and an impact wall surface 203;

the small diversion angle side wall surface 205 is positioned with a vector tangent to the inner wall of the tubular swirl chamber part 12;

the positioning vector of the small flow guide angle surface 204 is tangent to the cylindrical surface of the upper flow guide column 221, the end far away from the upper flow guide column 221 is connected with the small flow guide angle side wall surface 205, and the end near the upper flow guide column 221 is connected with one end of the axial inner arc surface 208;

the impact wall surface 203 is parallel to the flow guide small-angle side wall surface 205, and the end of the impact wall surface close to the upper flow guide column 221 is connected with the other end of the axial arc surface 208;

the axially intrados surface 208 conforms to the radius of the inner wall of the tubular swirl chamber portion 12.

Preferably, the width of the small diversion angle surface (204) is 1/10-1/5 of the width of the small diversion angle side wall surface (205).

The height of the swirl guide vane 21 can be determined according to the actual flow demand, and when the thickness of the swirl guide vane 21 is unchanged and the number of the vanes is more, the flow area is smaller. The guide vane thickness may be determined by the actual flow demand.

In the flow-guiding type swirl atomizing nozzle of the sixth embodiment, the positioning vector of the flow-guiding small-angle surface 204 of the swirl guide vane 21 is tangent to the cylindrical surface of the upper flow-guiding column 221; the positioning vector of the small-angle flow guiding side wall surface 205 of the swirl guide vane 21 is tangent to the inner wall of the tubular swirl chamber part 12; the two tangential designs mainly take into account the problem of loss of liquid velocity, which makes the nozzle atomization better in low flow conditions.

The flow guide type swirl atomizing nozzle of the sixth embodiment improves the liquid atomization swirl strength through the special shape of the swirl guide vane 21.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.